A model rocket is subject to four forces during flight; weight, thrust, lift and drag. The same forces operate on a full-scale rocket as it moves through the atmosphere. Because the flight trajectory takes a real rocket into orbit quickly, the aerodynamic lift and drag are less important relative to a model rocket. For model rockets, the entire flight is conducted in the lower atmosphere and the aerodynamic effects are very important. But most important, it’s BIG FUN FOR KIDS.